刚刚升级到 xubuntu 17.04。每当我播放电影文件（*.ogv使用 vlc 或 parole）几秒钟后，就会出现黑屏/dev/sda1: clean, xxx/xxx files, xxx/xxx blocks，屏幕停留几秒钟后返回登录屏幕！似乎有类似问题之前在启动时问过。但是我在启动时没有遇到任何问题，只有在播放电影文件后才会发生这种情况。
我降级到 xubuntu 16.04.2，同样的问题仍然存在。我之前在 xubuntu 16.04 上没有遇到过这个问题。
知道是什么原因导致了这个问题吗？
编辑：
sudo ls -al /var/crash
total 13016
drwxrwsrwt 2 root whoopsie 4096 Apr 29 13:18 .
drwxr-xr-x 14 root root 4096 Feb 15 12:27 ..
-rwxrwxrwx 1 root whoopsie 0 Apr 29 13:04 .lock
-rw-r----- 1 root whoopsie 13317966 Apr 29 13:18 _usr_lib_xorg_Xorg.0.crash
和
sudo head -20 /var/crash/_usr_lib_xorg_Xorg.0.crash
ProblemType: Crash
Architecture: amd64
CrashCounter: 1
Date: Sat Apr 29 13:18:17 2017
DistroRelease: Ubuntu 16.04
ExecutablePath: /usr/lib/xorg/Xorg
ExecutableTimestamp: 1485390561
ProcCmdline: /usr/lib/xorg/Xorg -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
ProcCwd: /
ProcEnviron:
ProcMaps:
55ddea9e7000-55ddeac23000 r-xp 00000000 08:11 797435 /usr/lib/xorg/Xorg
55ddeae23000-55ddeae25000 r--p 0023c000 08:11 797435 /usr/lib/xorg/Xorg
55ddeae25000-55ddeae32000 rw-p 0023e000 08:11 797435 /usr/lib/xorg/Xorg
55ddeae32000-55ddeae43000 rw-p 00000000 00:00 0
55ddec210000-55ddedd29000 rw-p 00000000 00:00 0 [heap]
7f506594e000-7f5065cce000 rw-s 10cab4000 00:06 360 /dev/dri/card0
7f5065cce000-7f5065d1e000 rw-s 10ca53000 00:06 360 /dev/dri/card0
7f5065d1e000-7f506609e000 rw-s 00000000 00:05 129134 /drm mm object (deleted)
7f506609e000-7f506619e000 rw-s 10c903000 00:06 360 /dev/dri/card0
显卡：
sudo lshw -C video
*-display
description: VGA compatible controller
product: Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 06
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:27 memory:f0000000-f03fffff memory:e0000000-efffffff ioport:f000(size=64) memory:c0000-dffff
和司机：
lspci -nnk | grep -i vga -A3 | grep 'in use'
Kernel driver in use: i915